Abstract: A leveling instrument is provided with a flexible length of tubing extruded with a pair of thin-walled, balloon-like diaphragms at opposite ends thereof. The tubing contains a flow passage filled with liquid in communication with atmospheric pressure acting upon the liquid through the diaphragms. The liquid provides a leveling medium for the instruments for establishing the level of one location with respect to another location. A method of manufacturing the leveling instrument is also disclosed.

Abstract: A tool for forming a wire clamp includes an elongate member having projections extending transversely from one end thereof, the end including a groove receiving a portion of a wire defining a straight crossover portion extending between circular portions formed respectively by wrapping the wire around the projections. A tool for clamping or banding the preformed wire over a hose or other item to be clamped comprises a stationary block shaped part pivotally secured to a movable part at one end thereof. A threaded puller extends through the stationary part and one end thereof contacts the movable block intermediate the pivot and an opposite end containing a groove receiving the wire crossover portion. Opposite end portions of the wire are wrapped around a pair of posts, respectively, on the stationary block.

Abstract: A litter collection apparatus includes a novel arrangement for mounting litter retrieving projections on a retrieving belt of the apparatus, an improved receptacle and mechanism for emptying the receptacle, a novel arrangement for adjustably positioning the apparatus with respect to a surface over which it passes and an improved drive arrangement for the respective components of the apparatus.

Abstract: An apparatus for picking up surface litter on the ground includes a movable main frame towed by a lightweight vehicle. A roller carriage pivotally attached to the main frame supports identical front and rear oppositely rotating tandem rollers each having ground engaging rows of resilient fingers. The rollers are driven by a ground engaging drive wheel and sprocket gear arrangement. The resilient fingers spread apart to entrap litter and mesh between the rollers to transfer litter downstream, to a main frame conveyor for containment within a trash drum. A pair of wiper blades completely dislodge litter entrapped between the roller fingers and cooperate with upper portions of each roller to define a transfer path towards the conveyor. In a second embodiment, the trash drum is pivotally secured to the main frame to control the height of the drum discharge opening. In a third embodiment, a rectangular, box-like main frame is supported by a rear panel door of a dump truck.